When the moment came to break up the Jonas Brothers on Oct. 3, Nick Jonas tells PEOPLE that he went "into a bit of trance."

"You prep a million ways," says Nick, 21. But once he admitted to his brothers how he felt, that he wasn't sure the band could continue as it was, "there was sort of a shut-off that happened. It took some time, about 24 hours or so, before we could really talk about it."

On Tuesday came the exclusive announcement to PEOPLE that, as a professional music team, the sibling trio are "over for now."

At first, Joe, 24, and Kevin, 25, said they were shocked by what went down.

A very dapper Joe Jonas stepped out Thursday night but remained tight-lipped about the drama surrounding the staggeringly successful band he built with his brothers.

When asked about the Jonas Brothers, who've canceled their tour due to a "deep rift within the band" and deleted the group's Twitter account amid buzz they're not getting along, Jonas, 24, replied: "I'm not going to talk about that right now."

However, Jonas, who was attending the inaugural gala for the new Wallis Annenberg Center for the Performing Arts Gala in Beverly Hills, did offer a hint at what the future holds.

Nick Jonas and his rumored girlfriend, Miss Universe Olivia Culpo, made it clear that they're a couple when they were spotted kissing courtside at the U.S. Open tennis tournament in New York on Tuesday.